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《Journal of University of Electronic Science and Technology of China》 1989-02
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PERPENDICULARITY PRINCIPLE OF PROJECTION IN FOUR-DIMENSIONAL SPACE

Li jiayan (Dept.of Electronic Machinery)  
This paper systematically discusses the projections of geometrical elements perpendicular to each other remain perpendicular in four dimensional space and their low. It is concluded that if a line perpendicular to a line (plane or hyper-plane)in four dimensional space is parallel to a hyper-projective plane, their hyper-projections to that hyper-projective plane are perpendicular to each other.The projective rule of two planes(or hyperplanes) perpendicular to each other and a plane perpendicular to a hyperplane are also discussed, while some simple examples are given to illustrate the applications of these conclusions.
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【References】
Chinese Journal Full-text Database 1 Hits
1 Shen Jie Wu Yonghong Liu Haowu (College of Hydroelectric Eng., Sichuan University Chengdu 610065);Resolving Occlusion Problem in Augmented Reality[J];Journal of University of Electronic Science and Technology of China;2001-03
【Citations】
Chinese Journal Full-text Database 1 Hits
1 Li Jiayin;“ORTHOGONAL PROJECTION THEOREMS”OF FOUR DIMENSIONAL DESCRIPTIVE GEOMETRY[J];;1984-02
【Co-references】
Chinese Journal Full-text Database 1 Hits
1 Zhang Fengli;Qin Zhiguang;Jing Wajun(Inst. of Microcomputers. UEST of China Chengdu 610054);THE RESEARCH AND REALIZATION OF 3D GRAPHIC PARALLEL PROJECTIONS[J];JOURNAL OF UNIVERSITY OF ELECTRONIC SCIENCE AND TECHNOLOGY OF CHINA;1994-05
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